A 21-year-old man has been arrested at Gatwick Airport on suspicion of getting terrorist training abroad.

Scotland Yard said that the suspect was held after he got off a flight from Istanbul at around 2pm on Thursday and is being questioned at a police station in west London. He was held on suspicion of an offence under section 6 of the Terrorism Act 2006. Police said that they could not give any further detail about the man's arrest at this stage.

Passing through Turkey is a well-established route for people travelling to and from Syria. Counter-terrorism investigators have expressed concern about aspiring British jihadists travelling from the UK to Syria to learn how to fire guns and make bombs.

Abdul Waheed Majeed, 41, was suspected of being responsible for driving a lorry to a jail in Aleppo and detonating a bomb. He is among an estimated 20 Britons who have been killed in the fighting in the war-torn state.

The man was later bailed to return to a London police station on Friday, Scotland Yard said.